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Daniel M. Dobkin Enigmatics Sunnyvale, CA, Steven M. Weigand WJ Communications Inc. San Jose, CA

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UHF RFID and Tag Antenna Scattering, Part II: Theory

In Part II of this work, a numerical solution, using a reasonable estimate for the tag IC impedance, is shown to provide accurate estimates of the scattering effects of tag antennas. A greatly simplified scattering theory for tag arrays is also present...

June 1, 2006

Daniel M. Dobkin Enigmatics Sunnyvale, CA, Steven M. Weigand WJ Communications Inc. San Jose, CA

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In Part I of this article, 1 a number of experimental results were presented, suggesting that interactions in arrays of tag antennas play an important role in determining when a UHF RFID tag can be read, even when no other scattering is present in the environment. How can these...